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No. 333,958. Patented Jan.

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UNITED STATES THOMAS P. LYNCH, OF NEW YORK, N. Y.

SPRING BED-BOTTOM.

SPECIFICATION forming part of Letters Patent No. 333,958, dated January 5, 1886.

Application filed April 529, 1885. Serial No. 163,817.

To @ZZ whom t may concern.-

Be it known that I, THOMAS P. LYNCH, of the city, county, and State of New York, have invented a new and useful Improvement in Spring Bed-Bottoms, of which the following is a specification.

This invention relates to metallic spring bedbottoms.

It has for its object to construct a spring bed-bottom whose foundation or lower slats and top side slats are made of corrugated iron or steel, and lwhose transverse or binding strips are elevated at each end to form a spring-brace for the top side slats, thus making the frame very light, but strong and rigid, as will be hereinafter explained.

The accompanying drawings, which form part of this specification. and in which similarletters of reference indicate corresponding parts, fully illustrate my improved bed-bottom.

Figure 1 represents a top or plan view. Fig.2 illustrates an end View showing the manner in which the transverse strips C are elevated at each end to form the brace for the side top slats, c; and Fig. 3 represents more perfectly one of the corrugated slats c, of which the foundation of the bed is composed.

The principal defect which I have sought to overcome is the weakness of the foundation slats or strips, which are made usually of very thin iron or steel, in order that the bed-bottom may be folded or rolled up in a compact and close forni for transportation purposes. When these bed-bottoms are in use, the thin iron strips rest on the usual cross-slats of the bedstead, and as the said cross-slats are quite a distance apart the thin iron strips ot' the bed-bottom will become bent in between each 4o'slat, so that in a very short time the bed-hot tom must be removed and the strips straightened, or the bed is quite useless. Another defect in these beds is the side braces which support the top side slats. rlhis brace is usually rlveted to one of the bottom iron strips at one end and to the top side slat at the other end. By reason of the constant and severe use of the top side slat the said brace becomes either broken or bent out of shape.

The manner of constructing my bed-bottom, therefore, to overcome these defects, is as follows: The iron of which the slats a and e are (No model.)

composed is rst rolled with the longitudinal corrugations. The object of the corrugations is to prevent the said strips from bending between the slats of the bedstead, as above described, and also in order that the said slats can be made of light iron and yet retain their strength and rigidity. The transverse strips c c are bent upward at each end, as shown at n. n, to form the brace for the top side slats. The usual method of making these braces has been to rivet a separate piece on top of the transverse strips c. The greater part of the strain and Weight being on the side slats, which are secured to this brace, would cause the braces to be broken or loosened where they are joined to the transverse slats c. The longitudinal slats aa are riveted to the transverse strips c on the bottom-side, as shown in the drawings. The top side slats are riveted to the upper side and end of the transverse strips. To the bottom side of the said transverse strips are riveted the extension-'pieces fm, which support the outside slat a and the outer row of springs. The springs w w are riveted on the bottom to the corrugated slats a, the top being connected together by links or chains, which keep the springs in a vertical position.

Having thus described my improved spring bed-bottom, what I claim as new, and desire to secure by Letters Patent, is as follows, to wit:

l. In a spring bed-bottom, the transverse strips c, elevated at each end to form the spring-brace n, in combination with the upper side strips and extension-pieces m, as described and set forth.

2. A spring bed-bottom constructed of the corrugated strips c, transverse strips c, 'elevated at each end to form the brace n, and extension #pieces m, in combination with the springs w, side top slats, e, and chains or links to hold the springs vertical, all as described and specified.

In testimony that I claim the foregoing improvement in spring bed-bottoms, as above described, I have hereunto set my hand this 30th day of December, 1884.

' THOMAS P. LYNCH.

Witnesses:

WILLIAM KELLY, O. H. MOGIEHAN. 

